//exports和module.exports的区别
seajs.use(['a','b'],function(a,b){
    var oD=document.querySelector(".div1");
    console.log(a.add(10,20));
    console.log(a.denuce(30,20));
    console.log(b.multi(10,10));
    console.log(b.div(10,10));
    a.hello(oD,'hello');
});